What is a consideration when choosing between vSphere Encryption and vSAN Encryption?

An administrator wants to get information about a specific host and runs this code:
GET /v1/hosts/{sn}
An API code 404 is returned.
What is the reason for the error code?

Which tool is used for troubleshooting vSAN related issues when vCenter Server is unavailable?

A VxRail administrator is evaluating vSAN settings in preparation for vSAN configuration.
Which configurations will result in the lowest initial usable capacity?

There is a request to add new disks to an existing VM residing on a VxRail vSAN that you manage. One disk is
250 GB. The VM is using the vSAN default storage policy.
How many vSAN objects will be created?